Navigation system



FIG. 1 is a left-side elevation view of my invention;

FIG. 2 is a top elevation view of my invention;

FIG. 3 is a front elevation view of my invention;

FIG. 4 is a right-side elevation view of my invention;

FIG. 5 is a back elevation view of my invention;

FIG. 6 is a left-side elevation view of my invention;

FIG. 7 is a top elevation view of my invention;

FIG. 8 is a front elevation view of my invention;

FIG. 9 is a right-side elevation view of my invention;

FIG. 10 is a back elevation view of my invention;

FIG. 11 is an isometric view showing the front, top and one side of my invention in a cradle; and,

FIG. 12 is an isometric view showing the front, top and one side of my invention. 

The ornamental design for a navigation system, as shown and described. 